Die-casting apparatus



J. L. GERBER,

DIE CASTING APPARATUS.

APPLICATION FILED 050.27, 1919.

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J. L. GERBER.

DIE CASTING APPARATUS.

APPLICATION FILED 05027, 1919.

Patented Apr. 26, 19211 2 SHEETSSHEET 2.

%//7 nmxx WITNESS J0 mvzm'on arr eras JOHN L. GERBER, F PITTSBURGH, PENNSYLVANIA.

DIE-CASTING APPA A US.

' Specification of Letters Patent.

Patented Apr. 2c, rear.

Application filed December 27, 1919. Serial No. 347,792.

T 0 all whom it may concern:

Be it known that I, JOHN L. GERBER, a

resident of Pittsburgh, Allegheny county,

Pennsylvania, have invented a new and use- .ful Improvement in Die-Casting Apparatus,

of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevationwith certain arts cut away of apparatus embodying my lnvention;

Fig. 2 is aplan view of the same certainparts being shown in dotted outline;

The nature of my invention will be bestunderstood by reference to the accompanying. drawings in which I have shown the preferred embodiment thereof and which will now be described, it being premised,

however, that various changes can be made in the details of construction, arrangementand combination of the various parts Without departing from the spirit and scope of my invention as defined in the appended claims.

In these drawings, the numeral 2 designates a rotary head or turret which is journaled to rotate about a horizontal axisin suitable bearings 3, carried by-the supporting stands 4. This head or turret is provided with a. plurality of equally spaced radial projections 5, shown in the present 4 case as being four in number, and each of whichis provided at its outer end with a flange 6, which forms a seating for ball bearings 7 and also a bolting flange for a cap plate 8. Secured to each of these projections by meansof this cap plate is a hollow or socketed shaft member 9, mounted' to rotate on the ball bearing 7 and to which isrigidly secured a driving wheel 10,

tion.

the inwardly-tapering form shown at the which is preferably a beveled friction wheel. Each of the die molds 11 is provided with a tapered stem 12, adapted for removable insertion in one of the hollow shaft members 9, to have a driving connection therewith. In general, thesmdie molds may-be of any suitable character having a pouring nozzle or orifice 12*. I is, however, important that this nozzle ororifice shall be arranged so as to come at the top of the mold when the mold is in pouring position and that the axis of the orifice shall be substantially coincident with the axis of rotation of the mold. Furthermore, it is important that the nozzle containing this orifice shall be extended vertically so as to form a head or riser for the castings. machines of this character, it is manifestly diflicult and more or less. impracticable to exactly measure the quantity of metal which is poured into each mold for a casting operation By providingfor a head or riser any exce s metal is fully taken care of without its being thrown promiscuously about the casting room by the forceof rota- I also prefer to make the orifice of right hand side of Fig. 3, so as to insure free flow of metal into the interior of the mold.

In the operation of 13 designates an electric motor which is secured to a base 14, mounted for vertical movement in suitable uides15, mounted on the boss or support 1 The motor is suspended by a lever arm 18, carried by a shaft 19, to which is connected a bent lever 20.

The armature shaft 21 of this motor carries a beveled friction wheel 22, which is adapted to be moved into and out of driving engagement vwith any one of the friction wheels 10, by the manipulation of the lever 20."

One of the shafts or trunnions of the head or turret 2 is extended through its bearing,

as shown at 23, and'carries a hand-actuated wheel 24, on the. end portion of such extene sion. The head or turret is also provided ,with a plurality of pin holes 25, any one of which may be engaged by a pin 26, inserted through a plate or bracket 27 secured to one of the posts 4. The lever 20 is-so shaped thatits'handle portion 20 is adjacent to the handle lever 24. The operation is as follows:-

' One of the die molds having been re pared for a casting, its stem is inserte in one of the hollow shaft members 9, and the head or turret 2 is turned to bring sald mold into the upper vertical position. I The elecwheel 19. The die mold now commences to rotate and during its rotation is filled by means of any suitable pouring device, such as the spout or nozzle indicated at 28 in Fig. 1. Preferably the speed of rotationsliould be in'the neighborhood of one thousand revolutions per minute, while the mold is being filled. This rapid rotation of the mold acts centrifugally not only to densely pack the molten metal in the mold, but it also causes the forcing out of all gases from the inside of the molds. The result is a solid homogeneous casting practically free from blow holes, gas holes and shrinkage cavities. After the mold has been filled, the motor 13 is raised to disengage the friction gears, and c the head is rotated 90, bringing a new mold which has been repared in the meantime into casting posit on and bringing the filled mold to a position where it can be removed fram the machine.

In this manner, the operations can be carried out very rapidly by the use of a series of die molds which are successively placed in the apparatus and poured and then re- 4 moved.

The advantages of my invention will-be apparent to those familiar with the art, since it provides a machine which is extremely simple in its constructionan'd'mode of operation and by means of which die castings may be rapidly and accurately made. The

invention is particularly useful in connection with the-manufacture of die castings of relatively small sizes, although it may be used in making larger "castings.

' I claim:

1. Die-casting apparatus, comprisingfa head or turret mounted for rotation about a horizontal axis, a plurality of mold carriers on said head or turret, each of said carriers having means whereby it may be rotated and also having a socket member,

and a plurality of molds, each of said'molds having a projecting portion or stem. adapted for removable rotative engagement with one of said socket members, substantially as de scribed.

2. Die-casting apparatuscomprising a rotatable head or turret, a plurality of rotatable shaft members carried by the head or turret, and a die mold living a stem portion adapted for rotative engagement with any one of said shaft members, substantially as described. I

3. Die casting apparatus, comprising a head or turret mounted forrotation about a horizontal axis, a plurality of mold carriers mounted on said head or turret, each of said carriers having means whereby it may be rotated and also having a socket member, and a plurality of molds, each of which is adapted for rotative engagement with said socket member, each of said molds having a pouring opening whose center substantially coincides with'the' axis of rotation.

of the mold, and carrier, said orifice being extended externally of the mold to provide my hand.- 7

JOHN L. GERBER. 

